chore: initialize recovered claude workspace

src/utils/cliHighlight.ts

@@ -0,0 +1,54 @@
+// highlight.js's type defs carry `/// <reference lib="dom" />`. SSETransport,
+// mcp/client, ssh, dumpPrompts use DOM types (TextDecodeOptions, RequestInfo)
+// that only typecheck because this file's `typeof import('highlight.js')` pulls
+// lib.dom in. tsconfig has lib: ["ESNext"] only — fixing the actual DOM-type
+// deps is a separate sweep; this ref preserves the status quo.
+/// <reference lib="dom" />
+
+import { extname } from 'path'
+
+export type CliHighlight = {
+  highlight: typeof import('cli-highlight').highlight
+  supportsLanguage: typeof import('cli-highlight').supportsLanguage
+}
+
+// One promise shared by Fallback.tsx, markdown.ts, events.ts, getLanguageName.
+// The highlight.js import piggybacks: cli-highlight has already pulled it into
+// the module cache, so the second import() is a cache hit — no extra bytes
+// faulted in.
+let cliHighlightPromise: Promise<CliHighlight | null> | undefined
+
+let loadedGetLanguage: typeof import('highlight.js').getLanguage | undefined
+
+async function loadCliHighlight(): Promise<CliHighlight | null> {
+  try {
+    const cliHighlight = await import('cli-highlight')
+    // cache hit — cli-highlight already loaded highlight.js
+    const highlightJs = await import('highlight.js')
+    loadedGetLanguage = highlightJs.getLanguage
+    return {
+      highlight: cliHighlight.highlight,
+      supportsLanguage: cliHighlight.supportsLanguage,
+    }
+  } catch {
+    return null
+  }
+}
+
+export function getCliHighlightPromise(): Promise<CliHighlight | null> {
+  cliHighlightPromise ??= loadCliHighlight()
+  return cliHighlightPromise
+}
+
+/**
+ * eg. "foo/bar.ts" → "TypeScript". Awaits the shared cli-highlight load,
+ * then reads highlight.js's language registry. All callers are telemetry
+ * (OTel counter attributes, permission-dialog unary events) — none block
+ * on this, they fire-and-forget or the consumer already handles Promise<string>.
+ */
+export async function getLanguageName(file_path: string): Promise<string> {
+  await getCliHighlightPromise()
+  const ext = extname(file_path).slice(1)
+  if (!ext) return 'unknown'
+  return loadedGetLanguage?.(ext)?.name ?? 'unknown'
+}